Seiko Cal. 5685 - 311

The 5685-311 is a sought-after Solar piece from Seiko's golden era. Powered by the 5685 caliber with 25j jewels beating at 28,800 bph, it delivers a 44 hours power reserve. [seikata-wm-9f7a08b5f829]

Also known as: Helmet, Baby Tuna

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

8.3mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

Green

Jewels

25j

Frequency

28,800 bph

Power Reserve

44 hours

Year

1968

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